JPH0771727A - Gas burner - Google Patents

Abstract

PURPOSE:To provide a gas burner which prevents generation of fire extinguishing sound in extinguishing a fire and generation of back flow of flames and attempts an increase of heating power. CONSTITUTION:Three blowing pipes 36 are collectively arranged mutually adjacent to one another so as to be formed into an approximately triangle shape as seen from above, thereby one blowing pipe group 37 is formed. Moreover, a plurality of blowing pipe groups 37 are formed on the peripheral surface of a burner main body 21 at specific pitches.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas burner, and more particularly to a gas burner for cooking used for commercial purposes.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view conceptually showing a conventional gas burner 1.

The gas burner 1 is composed of a gas burner body 3 placed on a table 2 such as a table, and an air amount adjusting device 4 for mixing air and gas.

Of these, the gas burner main body 3 is composed of two annular pipes 5 and 6 which are concentrically arranged and have different diameters. A plurality of independent blow tubes 7 having a structure are formed at a predetermined pitch with their axial centers oriented in the same direction as the central axis of the gas burner body 3.

A pipe 8 is provided between the annular pipes 5 and 6.
Further, a pipe 9 communicating with the annular pipe 5 is connected to the side of the annular pipe 5 having a large diameter, and its tip communicates with the air amount adjusting device 4.

This air amount adjusting device 4 has a funnel-shaped outer pipe 10, a nozzle 11 for ejecting gas concentrically arranged from the large diameter portion 10a side of the pipe 10 into the pipe 10, Large diameter part 1 of the nozzle 11 and the pipe 10
0a and a damper 12 that changes the cross-sectional area of a pair of fan-shaped air suction holes 10b formed between the air suction holes 10b and 0a.

The damper 12 is composed of a disk-shaped plate 13 rotatably supported by the nozzle 11, and the plate 13 has a position facing the air intake hole 10b. Hole 13a having the same shape as the suction hole 10b
Are formed.

Therefore, when the plate 13 is rotated by a predetermined angle, the air suction hole 10b formed in the pipe 10 is formed.
Changes the cross-sectional area, and the suction amount of the air (arrow A) sucked into the pipe 10 through the suction hole 10b is adjusted. The nozzle 11 communicates with the gas pipe 15 via the gas plug 14.

[0009]

By the way, in general, in order to increase the heating power of the gas flame generated from the gas burner main body 3, the independent blower pipe 7 of one structure formed in the gas burner main body 3 is used. A gas flame ejected from an independent blow tube 7 having a single structure by increasing the inner diameter (that is, setting the cross-sectional area of the inner diameter to a large value), thereby increasing the ejection amount of the air-fuel mixture ejected from the blow tube 7. It would be better to increase the firepower of.

However, in order to increase the heating power of the gas flame, if only the inner diameter of the blow pipe 7 is set large,
Not only a loud extinguishing noise is generated when extinguishing the fire, but also a flame generated from the blower pipe 7 when extinguishing the fire may flow back into the gas burner main body 3.

In view of the above-mentioned circumstances, the present invention provides a gas burner capable of increasing fire power while preventing fire noise and fire backflow as much as possible. To aim.

[0012]

In order to solve the above-mentioned problems, in the gas burner of the present invention, three blow pipes are arranged adjacent to each other so as to have a substantially triangular shape when viewed from the upper surface, whereby One blow tube group is formed, and the blow tube group is formed at a plurality of positions on the peripheral surface of the burner body at a predetermined pitch.

[0013]

According to the above-described gas burner, three blow tubes are collectively arranged to form one blow tube group, and the blow tube groups are formed at a plurality of positions on the peripheral surface of the burner body at a predetermined pitch. Compared with the cross-sectional area S of the inner diameter of the independent blow tube of one configuration, the cross-sectional area of the inner diameter of one blow tube group is 3S,
The cross-sectional area of the inner diameter is tripled, so that the combustion power of the gas flame can be made even stronger, and in order to increase the cross-sectional area of the inner diameter of one blowing tube group, one blowing tube group is formed. Since the cross-sectional area of the inner diameter of the blow tube of the book is not increased, the extinguishing noise at the time of extinguishing each blow tube group and the occurrence of the backflow of flame are prevented as much as possible.

[0014]

EXAMPLE An example of the gas burner according to the present invention will be described in detail below.

FIG. 1 is a perspective view conceptually showing a gas burner 20 according to the present invention, and the same parts as those in FIG. 5 are designated by the same reference numerals.

The gas burner 20 includes a burner main body 21 placed on a table 2 such as a table, and the burner main body 2
It is composed of an air amount adjusting device 22 for supplying a mixture of a fuel gas and air.

It should be noted that three air amount adjusting devices 22 are installed on the burner body 21.
2 is a burner body 21 to be described later via a connection pipe 23.
It communicates with the air-fuel mixture guide passage formed inside.

The air amount adjusting device 22 has a first pipe 24 having one end fitted and fixed to one end 23a of the connection pipe 23 and having both ends open, and is concentrically arranged in the first pipe 24. Further, it is composed of a second pipe 25 whose both ends are open, and a nozzle 26 for ejecting gas which is concentrically arranged in the second pipe 25.

According to such an air amount adjusting device 22, as shown in FIG. 2 which is an enlarged sectional view of the device 22, the outer peripheral surface 26b of the nozzle 26 and the inner peripheral surface 25a of the second pipe 25 are provided. The gap between the two forms an intake passage 27 for the primary air (arrow B) having an annular cross section along the axial direction of the nozzle 26. Further, the outer peripheral surface 25b of the second pipe 25 and the first pipe 24 are separated from each other. Due to the gap between the inner peripheral surface 24a and the inner peripheral surface 24a, an intake passage 28 for the secondary air (arrow C) having an annular cross section is formed along the axial direction of the nozzle 26. Therefore, when the gas (arrow D) is ejected from the tip 26b of the nozzle 26, the negative pressure generated in the first and second pipes 24 and 25 causes the primary air (arrow B) and the secondary air (arrow C). And the nozzle 2 through the suction passages 27 and 28.
It is rapidly sucked along the axial direction of 6, and then mixed with the gas (arrow D).

Incidentally, as shown in FIG. 2, the inner peripheral surfaces 24a, 25a of the first pipe 24 and the second pipe 25, respectively.
Is formed in a funnel shape so that the large diameter portions 24a ', 25a' thereof face the nozzle 26. Therefore, the primary air (arrow B) and the secondary air (arrow C) passing through the suction passages 27 and 28 are separated from each other by the funnel-shaped inner peripheral surfaces 24a and 24a.
25a is sucked toward the axial center of the air amount adjusting device 22 and thus is quickly mixed with the gas (arrow D).

The second pipe 25 is connected to the first pipe 25.
Rib 24b formed on the large diameter portion 24a 'of the pipe 24 of
Are formed integrally with each other. Further, as shown in FIGS. 2 and 1, a pair of holes 24c whose planes are fan-shaped are formed in the rib 24b.
The cross-sectional area of is changed by a damper 30 composed of a disk-shaped plate 29 rotatably supported by the second pipe 25. The plate 29 has ribs 24b.
A hole 29a having substantially the same shape is formed at a position facing the hole 24c formed in the.

According to the damper 30 described above, the plate 2
When 9 is rotated by a predetermined angle, the cross-sectional area of the hole 24c changes, and the flow rate of the secondary air (arrow C) sucked through the suction passage 28 (FIG. 2) is adjusted.

As shown in FIGS. 1 and 2,
The tip 26b of the nozzle 26 is attached to the second pipe 25.
It is detachably supported by a plurality of ribs 25c formed at a predetermined position on the inner peripheral surface thereof, and its rear end 26c communicates with the gas pipe 15 via the gas plug 14 as shown in FIG. In FIG. 2, reference numeral 31 is a connection pipe fitted to the tip 25d of the second pipe 25, and the tip 31a of the connection pipe 31 extends to almost the tip 24d of the first pipe 24. Has been done. Further, in FIG. 2, reference numeral 32 is a bolt for fastening the connection pipe 23 and the first pipe 24, and reference numeral 33 is for fastening the plate 29 of the damper 30 at a predetermined position of the second pipe 25. It is a bolt.

On the other hand, the burner body 21 according to the present invention
As shown in FIG. 1, is composed of two annular pipes 34 and 35 that are concentrically arranged and have different diameters.

The upper surfaces 34a of the annular pipes 34 and 35,
Three blow pipes 36 are arranged adjacent to each other so as to have a substantially triangular shape when viewed from the upper surface of the pipe 35a, thereby forming one blow pipe group 37, and the one blow pipe group 37.
Are formed on the peripheral surface of the burner body 21 at a plurality of positions at a predetermined pitch.

The blow tube group 37 is integrally formed with the annular pipes 34 and 35 as shown in FIG. 3 which is a longitudinal sectional view of the burner main body 21 shown in FIG.
Each of the blow pipes 36 forming 7 is formed by inclining the central axis 36a thereof toward the central axis 21a of the burner body 21 by 7 ° with respect to the vertical direction.

According to the above-mentioned gas burner body 21, 3
Since the blowpipes 36 of a book are arranged adjacent to each other to form one blowpipe group 37, one blowpipe is compared with the cross-sectional area of the inner diameter of an independent blowpipe having a conventional one-piece construction. In the group 37, the total cross-sectional area of the inner diameter is tripled and increased, so that the fire power of the gas flame can be made stronger accordingly. In addition, when increasing the cross-sectional area of the inner diameter of one blowing tube group 37, the cross-sectional area of each inner diameter of the three blowing tubes 36 forming this one blowing tube group 37 is set to the same cross-sectional area as the conventional one and is not increased. The occurrence of a fire extinguishing sound at the time of extinguishing each of the blow tube groups 37 and the occurrence of a backflow of flame are prevented as much as possible.

Further, according to the gas burner main body 21, the central axis 36a of each of the blow pipes 36 forming each blow pipe group 37 is a bar.
Since it is inclined toward the central axis 21a of the main body 21,
A tall gas flame is generated from each of the blow tube groups 37 toward the central portion of the burner main body 21, and the heating power of the central portion of the burner main body 21 can be made even stronger.

As shown in FIG. 4 which is a sectional view taken along the line EE in FIG. 3, among the annular pipes 34, 35 of the burner main body 21, the annular pipe 34 having the larger diameter is defined within each other. Guide passages 34a, 34b for the mixed gas (arrow F) are formed, and independent inlet ports 34a ', 34b' are formed in the guide passages 34a, 34b, respectively. 34a ', 34b'
Are connected to independent air amount adjusting devices 22 via connection pipes 23 as shown in FIG. In addition,
In the small diameter annular pipe 35, the guide passage 34a,
A passage 35a for the air-fuel mixture (arrow F) that is independent from 34b.
Is formed in the guide passage 35a, and an inlet port 35a 'communicating only with the guide passage 35a is formed. The inlet port 35a' is connected to the connecting pipe 2a.
Independent air amount adjusting device 2 as shown in FIG.
It communicates with 2.

Therefore, according to the burner main body 21 described above, the independent air-fuel guide passages 34a, 34b, 35a are provided in the annular pipes 34, 35 arranged concentrically.
And the air-fuel mixture is supplied to each of the guide passages via an independent air amount adjusting device 22, so that the gas and air have the same mixing ratio into the guide passages 34a, 34b, 35a. Or, a different mixture will be supplied.

[0031]

As described above, according to the gas burner of the present invention, three blow tubes are collectively arranged to form one blow tube group, and a plurality of blow tube groups are formed on the peripheral surface of the burner body at a predetermined pitch. Since the cross-sectional area of the inner diameter of one blower tube group is tripled and increased as compared with the conventional cross-sectional area of the inner diameter of a single independent blower tube, the gas flame is increased accordingly. Can be made even more powerful, and when increasing the cross-sectional area of the inner diameter of one blow tube group, the cross-sectional area of each inner diameter of the three blow tube groups that make up this one blow tube group must be the same as before. Therefore, it is possible to prevent the occurrence of extinguishing noise and the occurrence of backflow of flames when extinguishing each of the blow tube groups as much as possible, and therefore to provide a gas burner that is easy to handle and has further improved heating power. You can Further, since three blowpipes are collectively arranged to form one blowpipe group integrally, the mechanical strength of the portion that generates the gas flame is higher than that of the conventional single blowpipe independent blowpipe. Therefore, there is also an excellent effect that even if the blow tube group collides with another article, for example, a wok or the like during use, it is less likely to be damaged.

[Brief description of drawings]

FIG. 1 is a conceptual perspective view of a gas burner according to the present invention.

FIG. 2 is an enlarged cross-sectional view of an air amount adjusting device.

FIG. 3 is a longitudinal sectional view of a burner body according to the present invention.

FIG. 4 is a DD cross-sectional view of FIG.

FIG. 5 is a conceptual perspective view showing a conventional gas burner.

[Explanation of symbols]

 20 ... Gas burner 21 ... Burner main body 36 ... Blowing pipe 37 ... Blowing pipe group

Claims (2)

[Claims] 1. A blower tube group is formed by arranging three blower tubes adjacent to each other so as to form a substantially triangular shape when viewed from the top, and the blower tube group is formed around the burner body. A gas burner characterized by being formed at a plurality of positions on a surface at a predetermined pitch. 2. The blow tube of the blow tube group has the central axis as the bar.
The gas burner according to claim 1, wherein the gas burner is formed so as to be inclined 7 ° with respect to the vertical direction toward the central axis of the main body.